Add database package with Drizzle schema

Postgres schema via Drizzle ORM for agents, goals, issues, projects,
and activity log tables. Includes migration runner, seed script,
and Drizzle config.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/db/src/schema/activity_log.ts

@@ -0,0 +1,12 @@
+import { pgTable, uuid, text, timestamp, jsonb } from "drizzle-orm/pg-core";
+import { agents } from "./agents.js";
+
+export const activityLog = pgTable("activity_log", {
+  id: uuid("id").primaryKey().defaultRandom(),
+  action: text("action").notNull(),
+  entityType: text("entity_type").notNull(),
+  entityId: uuid("entity_id").notNull(),
+  agentId: uuid("agent_id").references(() => agents.id),
+  details: jsonb("details"),
+  createdAt: timestamp("created_at", { withTimezone: true }).notNull().defaultNow(),
+});

packages/db/src/schema/agents.ts

@@ -0,0 +1,15 @@
+import { type AnyPgColumn, pgTable, uuid, text, integer, timestamp, jsonb } from "drizzle-orm/pg-core";
+
+export const agents = pgTable("agents", {
+  id: uuid("id").primaryKey().defaultRandom(),
+  name: text("name").notNull(),
+  role: text("role").notNull().default("general"),
+  status: text("status").notNull().default("idle"),
+  budgetCents: integer("budget_cents").notNull().default(0),
+  spentCents: integer("spent_cents").notNull().default(0),
+  lastHeartbeat: timestamp("last_heartbeat", { withTimezone: true }),
+  reportsTo: uuid("reports_to").references((): AnyPgColumn => agents.id),
+  metadata: jsonb("metadata"),
+  createdAt: timestamp("created_at", { withTimezone: true }).notNull().defaultNow(),
+  updatedAt: timestamp("updated_at", { withTimezone: true }).notNull().defaultNow(),
+});

packages/db/src/schema/goals.ts

@@ -0,0 +1,13 @@
+import { type AnyPgColumn, pgTable, uuid, text, timestamp } from "drizzle-orm/pg-core";
+import { agents } from "./agents.js";
+
+export const goals = pgTable("goals", {
+  id: uuid("id").primaryKey().defaultRandom(),
+  title: text("title").notNull(),
+  description: text("description"),
+  level: text("level").notNull().default("task"),
+  parentId: uuid("parent_id").references((): AnyPgColumn => goals.id),
+  ownerId: uuid("owner_id").references(() => agents.id),
+  createdAt: timestamp("created_at", { withTimezone: true }).notNull().defaultNow(),
+  updatedAt: timestamp("updated_at", { withTimezone: true }).notNull().defaultNow(),
+});

packages/db/src/schema/index.ts

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+export { agents } from "./agents.js";
+export { projects } from "./projects.js";
+export { goals } from "./goals.js";
+export { issues } from "./issues.js";
+export { activityLog } from "./activity_log.js";

packages/db/src/schema/issues.ts

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+import { pgTable, uuid, text, timestamp } from "drizzle-orm/pg-core";
+import { agents } from "./agents.js";
+import { projects } from "./projects.js";
+import { goals } from "./goals.js";
+
+export const issues = pgTable("issues", {
+  id: uuid("id").primaryKey().defaultRandom(),
+  title: text("title").notNull(),
+  description: text("description"),
+  status: text("status").notNull().default("backlog"),
+  priority: text("priority").notNull().default("medium"),
+  projectId: uuid("project_id").references(() => projects.id),
+  assigneeId: uuid("assignee_id").references(() => agents.id),
+  goalId: uuid("goal_id").references(() => goals.id),
+  createdAt: timestamp("created_at", { withTimezone: true }).notNull().defaultNow(),
+  updatedAt: timestamp("updated_at", { withTimezone: true }).notNull().defaultNow(),
+});

packages/db/src/schema/projects.ts

@@ -0,0 +1,9 @@
+import { pgTable, uuid, text, timestamp } from "drizzle-orm/pg-core";
+
+export const projects = pgTable("projects", {
+  id: uuid("id").primaryKey().defaultRandom(),
+  name: text("name").notNull(),
+  description: text("description"),
+  createdAt: timestamp("created_at", { withTimezone: true }).notNull().defaultNow(),
+  updatedAt: timestamp("updated_at", { withTimezone: true }).notNull().defaultNow(),
+});